Sole



FIG. 1 is a right side view of a sole showing the claimed design; and,

FIG. 2 is a bottom view thereof.

The dashed broken lines in the figures show portions of the sole and environment that form no part of the claimed design.

The dot-dash broken lines in the figures show boundaries that form no part of the claimed design. 

CLAIM The ornamental design for a sole, as shown and described. 